From f3249e405321ce76df4d550237b18c8d42fcb2e8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luis=20=C3=81ngel=20San=20Mart=C3=ADn?=
 <luisangelsm@gmail.com>
Date: Sun, 9 Jul 2023 10:44:43 +0200
Subject: [PATCH] Add shortcuts to control the double page mode offset

---
 YACReader/main_window_viewer.cpp           |  9 ++++++-
 YACReader/viewer.cpp                       | 30 ++++++++++++++++++++++
 YACReader/viewer.h                         |  2 ++
 shortcuts_management/shortcuts_manager.cpp |  2 ++
 shortcuts_management/shortcuts_manager.h   |  2 ++
 5 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/YACReader/main_window_viewer.cpp b/YACReader/main_window_viewer.cpp
index 2188cb30..6c69254a 100644
--- a/YACReader/main_window_viewer.cpp
+++ b/YACReader/main_window_viewer.cpp
@@ -1252,6 +1252,11 @@ void MainWindowViewer::setUpShortcutsManagement()
     auto *const goToLastPageAction = addActionWithShortcut(tr("Go to the last page"), GO_TO_LAST_PAGE_ACTION_Y);
     connect(goToLastPageAction, &QAction::triggered, viewer, &Viewer::goToLastPage);
 
+    auto *const offsetDoublePageToTheLeft = addActionWithShortcut(tr("Offset double page to the left"), OFFSET_DOUBLE_PAGE_TO_THE_LEFT_Y);
+    connect(offsetDoublePageToTheLeft, &QAction::triggered, viewer, &Viewer::offsetDoublePageToTheLeft);
+    auto *const offsetDoublePageToTheRight = addActionWithShortcut(tr("Offset double page to the right"), OFFSET_DOUBLE_PAGE_TO_THE_RIGHT_Y);
+    connect(offsetDoublePageToTheRight, &QAction::triggered, viewer, &Viewer::offsetDoublePageToTheRight);
+
     loadedComicActions = { autoScrollForwardAction,
                            autoScrollBackwardAction,
                            autoScrollForwardHorizontalFirstAction,
@@ -1263,7 +1268,9 @@ void MainWindowViewer::setUpShortcutsManagement()
                            moveLeftAction,
                            moveRightAction,
                            goToFirstPageAction,
-                           goToLastPageAction };
+                           goToLastPageAction,
+                           offsetDoublePageToTheLeft,
+                           offsetDoublePageToTheRight };
 
     editShortcutsDialog->addActionsGroup(tr("Reading"), QIcon(":/images/shortcuts_group_reading.svg"),
                                          tmpList = QList<QAction *>()
diff --git a/YACReader/viewer.cpp b/YACReader/viewer.cpp
index 61273666..d8d56582 100644
--- a/YACReader/viewer.cpp
+++ b/YACReader/viewer.cpp
@@ -1083,6 +1083,36 @@ void Viewer::setBookmarks()
     bd->setBookmarks(*render->getBookmarks());
 }
 
+void Viewer::offsetDoublePageToTheLeft()
+{
+    if (!doublePage) {
+        return;
+    }
+
+    if (doubleMangaPage) {
+        render->previousPage();
+    } else {
+        render->nextPage();
+    }
+
+    updateInformation();
+}
+
+void Viewer::offsetDoublePageToTheRight()
+{
+    if (!doublePage) {
+        return;
+    }
+
+    if (doubleMangaPage) {
+        render->nextPage();
+    } else {
+        render->previousPage();
+    }
+
+    updateInformation();
+}
+
 void Viewer::showIsCoverMessage()
 {
     if (!shouldOpenPrevious) {
diff --git a/YACReader/viewer.h b/YACReader/viewer.h
index 42b46b85..b6134d78 100644
--- a/YACReader/viewer.h
+++ b/YACReader/viewer.h
@@ -101,6 +101,8 @@ public slots:
     void showMessageErrorOpening(QString);
     void processCRCError(QString message);
     void setBookmarks();
+    void offsetDoublePageToTheLeft();
+    void offsetDoublePageToTheRight();
     // deprecated
     void updateImageOptions();
     void updateFilters(int brightness, int contrast, int gamma);
diff --git a/shortcuts_management/shortcuts_manager.cpp b/shortcuts_management/shortcuts_manager.cpp
index 1680b374..e2ce5841 100644
--- a/shortcuts_management/shortcuts_manager.cpp
+++ b/shortcuts_management/shortcuts_manager.cpp
@@ -69,6 +69,8 @@ void ShortcutsManager::initDefaultShorcuts()
     defaultShorcuts.insert(MOVE_UP_ACTION_Y, Qt::Key_Up);
     defaultShorcuts.insert(GO_TO_FIRST_PAGE_ACTION_Y, Qt::Key_Home);
     defaultShorcuts.insert(GO_TO_LAST_PAGE_ACTION_Y, Qt::Key_End);
+    defaultShorcuts.insert(OFFSET_DOUBLE_PAGE_TO_THE_LEFT_Y, Qt::CTRL | Qt::SHIFT | Qt::Key_Left);
+    defaultShorcuts.insert(OFFSET_DOUBLE_PAGE_TO_THE_RIGHT_Y, Qt::CTRL | Qt::SHIFT | Qt::Key_Right);
     // mglass
     defaultShorcuts.insert(SIZE_UP_MGLASS_ACTION_Y, Qt::Key_Plus);
     defaultShorcuts.insert(SIZE_DOWN_MGLASS_ACTION_Y, Qt::Key_Minus);
diff --git a/shortcuts_management/shortcuts_manager.h b/shortcuts_management/shortcuts_manager.h
index cb201c88..8f727114 100644
--- a/shortcuts_management/shortcuts_manager.h
+++ b/shortcuts_management/shortcuts_manager.h
@@ -152,6 +152,8 @@ public:
 #define MOVE_RIGHT_ACTION_Y "MOVE_RIGHT_ACTION_Y"
 #define GO_TO_FIRST_PAGE_ACTION_Y "GO_TO_FIRST_PAGE_ACTION_Y"
 #define GO_TO_LAST_PAGE_ACTION_Y "GO_TO_LAST_PAGE_ACTION_Y"
+#define OFFSET_DOUBLE_PAGE_TO_THE_LEFT_Y "OFFSET_DOUBLE_PAGE_TO_THE_LEFT_Y"
+#define OFFSET_DOUBLE_PAGE_TO_THE_RIGHT_Y "OFFSET_DOUBLE_PAGE_TO_THE_RIGHT_Y"
 // mglass
 #define SIZE_UP_MGLASS_ACTION_Y "SIZE_UP_MGLASS_ACTION_Y"
 #define SIZE_DOWN_MGLASS_ACTION_Y "SIZE_DOWN_MGLASS_ACTION_Y"